High-throughput search for magnetic topological materials using spin-orbit spillage, machine learning, and experiments
- 16 April 2021
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 103 (15), 155131
- https://doi.org/10.1103/physrevb.103.155131
Abstract
Magnetic topological insulators and semimetals have a variety of properties that make them attractive for applications, including spintronics and quantum computation, but very few high-quality candidate materials are known. In this paper, we use systematic high-throughput density functional theory calculations to identify magnetic topological materials from the ≈40 000 three-dimensional materials in the JARVIS-DFT database. First, we screen materials with net magnetic moment and spin-orbit spillage (SOS) , resulting in 25 insulating and 564 metallic candidates. The SOS acts as a signature of spin-orbit-induced band-inversion. Then we carry out calculations of Wannier charge centers, Chern numbers, anomalous Hall conductivities, surface band structures, and Fermi surfaces to determine interesting topological characteristics of the screened compounds. We also train machine learning models for predicting the spillages, band gaps, and magnetic moments of new compounds, to further accelerate the screening process. We experimentally synthesize and characterize a few candidate materials to support our theoretical predictions.
Keywords
Funding Information
- National Institute of Standards and Technology
- U.S. Department of Energy
This publication has 61 references indexed in Scilit:
- Chemical accuracy for the van der Waals density functionalJournal of Physics: Condensed Matter, 2009
- Topological Insulators and Nematic Phases from Spontaneous Symmetry Breaking in 2D Fermi Systems with a Quadratic Band CrossingPhysical Review Letters, 2009
- wannier90: A tool for obtaining maximally-localised Wannier functionsComputer Physics Communications, 2008
- Insulator/Chern-insulator transition in the Haldane modelPhysical Review B, 2006
- Quantum Spin Hall Effect in GraphenePhysical Review Letters, 2005
- Two-dimensional gas of massless Dirac fermions in grapheneNature, 2005
- NaRuO2 and NaxRuO2·yH2O: New Oxide and Oxyhydrate with Two Dimensional RuO2 LayersInorganic Chemistry, 2004
- Maximally localized generalized Wannier functions for composite energy bandsPhysical Review B, 1997
- Generalized Gradient Approximation Made SimplePhysical Review Letters, 1996
- Efficient iterative schemes forab initiototal-energy calculations using a plane-wave basis setPhysical Review B, 1996